I think I found a great solution for reading Windows 8.1 Book on Windows 8.1, which, when you think about it, is probably how many people will want to read it. Today's update of the NOOK app for Windows 8.1 adds a number of new features, among them the ability to sign in with your Microsoft account. And because this app can read on-device ePub files, you can use it to read a good-looking version of the book.

We'll have more soon—I'll be writing today, for example—but the book is currently about 163 pages long, of a projected 400 to 600 pages when completed.